Cell Management(5G RAN2.1_Draft a)

5G RAN

Cell Management Feature Parameter Description Issue

Draft A

Date

2018-12-30

HUAWEI TECHNOLOGIES CO., LTD.

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Copyright © Huawei Technologies Co., Ltd. 2019. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

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Email:

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5G RAN Cell Management Feature Parameter Description

Contents

Contents 1 Change History.............. History..................................... ............................................. ............................................ ............................................ ............................................ ........................ 1 1.1 5G RAN2.1 RAN2 .1 Draft A (2018-12-30).................................................................................................. (2018-12-30)................................................................................................................................. ............................... 1

2 General Statements............ Statements.................................. ............................................ ............................................. ............................................. ........................................ .................. 3 3 Cell Management.......... Management................................ ............................................ ............................................. ............................................. ............................................ ........................5 ..5 3.1 Principles........................................................................................ Principles ........................................................................................................................................................................ ................................................................................ 5 3.1.1 Definition.....................................................................................................................................................................5 Definition.....................................................................................................................................................................5 3.1.2 Related Concepts......................................................................... Concepts......................................................................................................................................................... ................................................................................ 5 3.1.2.1 Cell............................................................................................................................................................................6 Cell.... ........................................................................................................................................................................6 3.1.2.2 Sector ........................................................................................................................................................................ ........................................................................................................................................................................ 7 3.1.2.3 Sector Equipment................................................................................. Sector Equipment..................................................................................................................................................... .................................................................... 7 3.1.2.4 RF Equipment...........................................................................................................................................................7 Eq uipment...........................................................................................................................................................7 3.1.2.5 Baseband Baseband Equipment.................................................................................................................................... Equipment................................................................................................................................................ ............ 7 3.1.2.6 NR DU D U Cell TRP......................................................................................................................................................7 3.1.2.7 NR DU D U Cell Coverage Area..................................................................................................................................... Area..................................................................................................................................... 7 3.1.3 Typical Scenarios.........................................................................................................................................................7 3.1.3.1 Common Comm on Cell..................................................................................... Cell............................................................................................................................................................8 .......................................................................8 3.1.3.2 Combined-RRU Combi ned-RRU Cell............................................................................... Cell................................................................................................................................................ ................................................................. 8 3.1.3.3 Cells in i n Multi-Carrier Sectors.............................................................................................. Sectors...................................................................................................................................8 .....................................8 3.1.3.4 Uplink and and Downlink Downlink Decoupling Cells................................................................................................. Cells.................................................................................................................. ................. 9 3.1.3.5 RF Combination Co mbination Cell................................................................................................................................................ Cell................................................................................................................................................9 9 3.1.4 Cell-related Cell-rela ted Parameters...................................................................................... Parameters..............................................................................................................................................10 ........................................................10 3.1.4.1 Frequency Freque ncy Band...................................................................................................................................................... Band...................................................................................................................................................... 10 3.1.4.2 NARFCN........................................................................................ NARF CN................................................................................................................................................................ ........................................................................ 10 3.1.4.3 SSB Frequency-Domain F requency-Domain Position...........................................................................................................................12 3.1.4.4 Cell Bandwidth....................................................................................................................................................... Bandwidth....................................................................................................................................................... 13 3.1.4.5 Subcarrier Subcarrier Spacing.......................................................................... Spacing..................................................................................................................................................13 ........................................................................13 3.1.4.6 Uplink -Downlink -Downlink Slot Configuration.....................................................................................................................13 3.1.4.7 Transmit/Receive Transmit/Receive Mode........................................................................................... Mode..........................................................................................................................................13 ...............................................13 3.1.4.8 Maximum Transmit Power..................................................................................................................................... Power..................................................................................................................................... 13
















Contents

3.3 Requirements................................................................................................................................................................ Requirements................................................................................................................................................................ 14 3.3.1 Licenses........................................................................................................................ Licenses..................................................................................................................................................................... ............................................. 14 3.3.2 Software..................................................................................................................................................................... Software.....................................................................................................................................................................14 14 3.3.3 Hardware............................................................................... Hardware................................................................................................................................................................... .................................................................................... 15 3.4 Operation and Maintenance.......................................................................................................................................... Maintenance..........................................................................................................................................16 16 3.4.1 Data Configuration....................................................................................................................... Configuration.................................................................................................................................................... ............................. 17 3.4.1.1 Data Preparation....................................................................................................................... Preparation..................................................................................................................................................... .............................. 17 3.4.1.2 Using MML Commands.........................................................................................................................................23 3.4.1.3 Using the CME....................................................................................................................................................... CME....................................................................................................................................................... 29 3.4.2 Activation Observation..............................................................................................................................................29

4 Glossary......... Glossary................................ ............................................. ............................................ ............................................ ............................................ .......................................30 .................30 5 Reference Documents......... Documents............................... ............................................ ............................................ ............................................ ...................................... ................ 31
















1 Change History

1

Change History

This section describes describes changes not included in the "Parameters", "Counters", "Glossary", and "Reference Documents" chapters. These ch anges include: include: l

Technical changes Changes in functions and their corresponding parameters

l

Editorial changes changes Improvements Improvements or revisions to the documentation documentation

1.1 5G RAN2.1 Draft A (2018-12-30) This issue introduces the following changes to 5G RAN2.0 01 (2018-10-10).

Technical Changes Change Description

Parameter Change

Base Station Model

Changed the name of the MO NRCell containing the TrackingAreaId parameter parameter to NRDUCELL. For details, see:

NRDUCell.Tracking AreaId

5900 series base stations

Added the configurations for the frequencyAdded the following domain position of the synchronization signal parameters: block (SSB). For details, see 3.1.4.3 SSB l NRDUCell. SsbDe SsbDe Frequency-Domain Frequen cy-Domain Position. scMethod


l

3.4.1.1 Data Preparation

l

3.4.1.2 Using MML MML Commands Commands

l

Added feature support for LampSite base stations. For details, see:

NRDUCell. SsbFr SsbFr eqPos

NA

DBS5900 LampSite base
















1 Change History

Editorial Changes Optimized descriptions for configuring the SSB center frequency. frequency. For details, see 3.1.4.2 NARFCN. Added support for the typical scenario of combined-RRU/RFU-sector cells. For details, see 3.1.3.2 Combined-RRU Cell.


















2 General Statements

2

General Statements

Purpose Feature Parameter Description documents are intended to acquaint readers with: l

The technical principles of features and their related parameters

l

The scenarios where these features are used, the benefits they provide, and the impact they have on networks and functions

l

Requirements of the operating environment that must be met before feature activation

l

Parameter configuration required for feature activation, verification of feature activation, and monitoring of feature performance NOTE

This document only provides guidance for feature activation. Feature deployment and feature gains depend on the specifics of the network scenario where the feature is deployed. To achieve the desired gains, contact Huawei professional service engineers.

Software Interfaces Any parameters, alarms, counters, or managed objects (MOs) described in Feature Parameter Description documents apply only to the corresponding software release. For future software releases, refer to the corresponding updated product documentation.

Trial Features
















2 General Statements

the current version. Huawei reserves the rights to convert trial features into commercial features in later R/C versions. If trial features are converted into commercial features in a later version, customers shall pay a licensing fee to obtain the relevant licenses prior to using the said commercial features. If a customer fails to purchase such a license, the trial feature(s) will be invalidated automatically when the product is upgraded.
















3 Cell Management

3

Cell Management

3.1 Principles 3.1.1 Definition Cell management refers to management of communications resources by establishing cells and configuring related parameters.

3.1.2 Related Concepts Figure 3-1 illustrates the components involved in cell management.
















Figure 3-1 Components involved in cell management

3 Cell Management
















3 Cell Management

3.1.2.2 Sector A sector is an area covered by antennas. A sector is added by running the ADD SECTOR command. Each sector uses one or more radio carriers to provide coverage. A sector can be omnidirectional or directional, depending on the antenna type. l

Omnidirectional An omnidirectional sector uses omnidirectional antennas to provide 360° coverage with the antenna at the center. center. In light-traffic areas, the deployment of omnidirectional sectors means fewer antennas need to be deployed, which reduces equipment cost.

l

Directional A directional sector uses directional antennas to provide coverage. Each directional antenna covers a 60° or 120° sector area, depending on whether there are six or three sectors configured on the gNodeB. The azimuth of each sector is slightly over 60 or 120 degrees in actual scenarios so that the sectors can overlap to ensure seamless coverage. In heavy-traffic areas, the deployment of directional sectors supports more traffic volume. Directional sectors allow for greater flexibility in area and sector planning.

3.1.2.3 Sector Equipment Sector equipment is a set of antennas that are used to provide coverage for the same sector. A sector is linked to a set of antennas comprising a specific piece of sector equipment by running the ADD SECTOR and and ADD SECTOREQM commands.

3.1.2.4 RF Equipment RF equipment is a set of RF processing units, such as remote radio units (RRUs) or active antenna units (AAUs). RF equipment is added and associated with CPRI ports on baseband processing units (BBPs) by running running the ADD RRUCHAIN and ADD RRU commands.

3.1.2.5 Baseband Equipment A set of baseband equipment consists of one or more BBPs. A BBP is added by running the ADD BRD command. It can be added to a piece of baseband equipment by running the ADD BASEBANDEQM command. The baseband equipment for NR must support both uplink and downlink transmissions.

3.1.2.6 NR DU Cell TRP


















3 Cell Management

3.1.3.1 Common Cell A common cell is a cell that is established in a sector served by an RF module. The cell shown in Figure 3-2 is a common cell. Figure 3-2 Common cell

3.1.3.2 Combined-RRU Cell A combined-RRU cell is served by two RRUs connected to the same antenna to cover the same area. This networking applies networking applies only to NR SUL (supplementary uplink) cells. SUL cells supports combination of 1T2R or 2T2R RRUs. Figure 3-3 Combined-RRU-sector cell (using 2T2R RRUs as an example)
















3 Cell Management

Multi-carrier sectors are used in densely populated areas where traffic increases rapidly, rapidly, such as exhibition centers, airport waiting areas, shopping malls, central business districts, and high-end residential areas. For details about carrier specifications, see RRU technical descriptions in 3900 & 5900 Series Base Station Product Product Documentation. Documentation.

3.1.3.4 Uplink and Downlink Decoupling Cells Uplink and downlink decoupling cells are cells that use high bands (such as 3.5 GHz) for downlink and low bands (such as 1.8 GHz/700 MHz) for uplink to improve uplink coverage. Figure 3-5 illustrates an uplink and downlink decoupling cell. Figure 3-5 Uplink and downlink decoupling cell

3.1.3.5 RF Combination Cell In a LampSite scenario, RF signals from multiple pRRUs are combined in the RHUB to form
















3 Cell Management

3.1.4 Cell-related Parameters This chapter describes the following cell-related parameters: frequency frequency band, NR absolute radio frequency channel number (NARFCN), SSB frequency-domain position, cell bandwidth, subcarrier spacing, uplink-downlink slot configuration, configuration, transmit/receive transmit/receive mode, and maximum transmit power. For details about other parameters of a cell, see the corresponding feature documentation. For example, for details about CPRI compression, see CPRI Compression. Compression. This version supports only TDD cells and SUL cells.

3.1.4.1 Frequency Band The frequency band of a cell is specified by the NRCell.FrequencyBand and and NRDUCell parameters. The two two parameters must be set to the same value. Table 3-1 lists the frequency bands supported by NR cells. cells. For details, see section section 5.2 "Operating bands bands for NR" in 3GPP TS 38.104 V15.2.0. Table 3-1 Frequency bands supported by NR cells

Frequency Band

Uplink Frequency Range (Lowest and Highest Frequencies)

Downlink Frequency Range (Lowest and Highest Frequencies)

Duplex Mode

n77

3300 MHz

4200 MHz

3300 MHz

4200 MHz

TDD

n78

3300 MHz

3800 MHz

3300 MHz

3800 MHz

TDD

n79

4400 MHz

5000 MHz

4400 MHz

5000 MHz

TDD















5G RAN Cell Management Feature Parameter Description l

3 Cell Management

If NRDUCell.UlNarfcnConfigInd is is set to NOT_CONFIG, calculate the uplink NARFCN and downlink NARFCN NARFCN based on the start start and end frequencies frequencies of the cell. The calculation procedure is as follows: a.

Determine Determine the downli downlink nk center center frequenc frequency y of a cell cell based based on on the downlink downlink start start frequency and downlink bandwidth of the cell. Cell's downlink center frequency (DLCELL REF) = Cell downlink start frequency (MHz) + Cell downlink bandwidth (MHz)/2

b.

Determine the uplink center center frequency of of a cell based on the uplink start frequency and uplink bandwidth of the cell. Cell's uplink center frequency (ULCELLREF) = Cell uplink start frequency (MHz) + Cell uplink bandwidth (MHz)/2

c.

Calculate Calculate the downli downlink nk and and uplink uplink center center NARFCNs NARFCNs of of the cell based based on the cell cell downlink center frequency (DLCELL REF) and the cell uplink center frequency (ULCELLREF), respectively. Cell's downlink center NARFCN (NREF-DLCELL) = Int{(DLCELLREF - FREF-Offs )/ ΔFGlobal + NREF-Offs } Cell's uplink center NARFCN (NREF-ULCELL) = Int{(ULCELLREF - FREF-Offs )/ ΔFGlobal + NREF-Offs } Table 3-2 Requirements for available NARFCNs

Frequency Band

Subcarrier Spacing

Available NARFCN

n41

30 kHz

The NARFCN must be an integral multiple of 6.

n77

30 kHz

The NARFCN must be an
















3 Cell Management

Table 3-3 Parameters related to N REF-CELL

Frequency Range (MHz)

ΔFGlobal (M (MHz)

FREF-Offs (M (MHz)

NREF-Offs

0–3000

0.005

0

0

3000–24250

0.015

3000

600000

24250–100000

0.06

24250.08

2016667

3.1.4.3 SSB Frequency-Domain Position In an NR system, an SSB comprises a primary synchronization signal (PSS), secondary synchronization signal (SSS), and PBCH. Each SSB provides 240 consecutive subcarriers. A UE searches for cells based on received PSS and SSS signals and obtains necessary information from the received broadcast system messages. Then, the UE selects the most appropriate cell to camp on using the received information. The SSB frequency-domain position indicates the SSB center frequency position of a cell. It is specified by the NRDUCell . SsbDescMethod and NRDUCell. SsbFreqPos SsbDescMethod and SsbFreqPos parameters. The SSB frequency-domain position is not configured for SUL cells, but must be configured for TDD cells. When the SSB frequency-domain position is configured, NRDUCell. SsbDescMethod is only SsbDescMethod is SsbFreqPos specifies the NARFCN set to SSB_DESC_TYPE_NARFCN . NRDUCell. SsbFreqPos corresponding to the SSB center frequency. Table 3-4 3 -4 lists the NRDUCell. SsbFreqPos SsbFreqPos settings.


















3 Cell Management

3.1.4.4 Cell Bandwidth The uplink and downlink bandwidths of a cell are respectively specified by the NRDUCell.UlBandwidth NRDUCell.UlBandwidth and NRDUCell. DlBandwidth DlBandwidth parameters. The uplink and downlink bandwidths of a cell must be the same. Table 3-5 3 -5 lists the bandwidth supported by an NR cell. Table 3-5 3 -5 Bandwidth supported by an NR cell

Duplex Mode

Supported Cell Bandwidth

TDD

40 MHz, 60 MHz, 80 MHz, 100 MHz

SUL

15 MHz, 20 MHz

3.1.4.5 Subcarrier Spacing SubcarrierSpacing parameter. The subcarrier spacing of a cell is specified by the NRDUCell. SubcarrierSpacing parameter.
















3 Cell Management

transmit antennas (NTx). NTx is configured by the NRDUCellTRP.TxRxMode parameter. The total transmit power of a cell is calculated as follows: PCell = Pmax_out + 10 x log10(NTx). If multiple cells are served by the same R RU or AAU, the sum of Pmax_out of these cells must be less than or equal to the the maximum transmit power of of the RRU's or AAU's transmit channel. Otherwise, ALM-29870 NR DU Cell TRP Unavailable is generated. NOTE l

l

For details about the maximum transmit power of RRUs or AAUs when different quantities of carriers are configured, see the following section in 3900 & 5900 Series Base Station Product Documentation Documentation:: 3900 & 5900 Series Base Station Technical Description > Typical Power Configuration Reference for RF Modules. SUL cells involve only uplink transmission and therefore require no transmit power configurations.

3.2 Network Analysis 3.2.1 Benefits
















3 Cell Management

3.3.3 Hardware Base Station Models l


l

DBS5900 LampSite base stations

Boards Only the UBBPfw1 and UMPTe boards support this function. For details about the RATs supported by boards, see BBU5900 see BBU5900 Hardware Hardware Description Description in in 3900 & 5900 Series Base Station Product Documentation. Documentation.

RF Modules All NR-capable AAUs/RRUs/pRRUs support this function. l

For details about NR-capable AAUs, see AAU Technical Technical Specifications. Specifications.
















3 Cell Management

l

If TDD cells under a base station have different uplink-downlink slot configurations, they must be bound to different BBPs. The uplink-downlink slot configurations of all TDD cells on the same BBP must be the same.

l

If TDD cells under a base station have different subcarrier spacing, they must be bound to different BBPs. The subframe spacing of all TDD cells on the same BBP must be the same.

l

If TDD cells under a base station have different bandwidths, they must be bound to different BBPs. The bandwidths of all TDD cells on the same BBP must be the same.

l

If both eCPRI 64T64R TDD cells and CPRI 64T64R TDD cells are served by the same base station, they must be bound bound to different BBPs. BBPs. The RF module models of all TDD cells on the same BBP must be the same.

l

If TDD cells under a base station have different transmit/receive modes, they must be bound to different different BBPs. The transmit/receive transmit/receive modes of all TDD cells cells on the same BBP must be the same.

The following requirements for configuring high-frequency cell must apply: Cells must be established on the BBP directly connected the RRU/AAU over the CPRI/eCPRI optic fiber, and such cells must also be bound to this BBP, if required.
















3 Cell Management

3.4.1 Data Configuration 3.4.1.1 Data Preparation The following table describes the parameters that must be set in a SECTOR MO MO to configure a sector.

Parameter Name

Parameter ID

Setting Notes

Sector ID

SECTOR . SECTORID SECTORID

Set this parameter to a unique value.

SECTOR . SECNAME SECNAME

N/A

SECTOR . LOCATIONN LOCATIONN AME

N/A

SECTOR .USERLABEL

N/A

Sector Name

Location Name

User Label

Antenna Azimuth SECTOR . ANTAZIMUT ANTAZIMUT N/A


















3 Cell Management

Parameter Name

Parameter ID

Setting Notes

Beam Azimuth Offset

SECTOREQM. BEAMA BEAMA ZIMUTHOFFSET ZIMUTHOFFSET

Set this parameter to None if the SECTOREQM. ANTCFGMODE ANTCFGMODE parameter is set to BEAM.

Antenna Number

SECTOREQM. ANTNU ANTNU M

-

Cabinet No. of

SECTOREQM. ANT1CN ANT1CN This parameter is mandatory when
















Parameter Name Tracking Area ID

Parameter ID

gNBTrackingArea.Track ingAreaId

Tracking Area Code gNBTrackingArea Tac

3 Cell Management

Setting Notes The setting of this parameter takes effect only for the gNodeB. The tracking area identity (TAI) specified by this parameter is different different from the TAI configured in the tracking area list (TAL) in the core network. N/A
















3 Cell Management

Parameter Name

Parameter ID

Setting Notes

Cell Radius

NRDUCell.CellRadius

The value of this parameter must be greater than or equal to the actual cell radius. Otherwise, UEs at the cell edge may fail to access the network.

NRDUCell. SlotAssignm SlotAssignm ent

This parameter needs to be set only for TDD cells.

Slot Assignment
















3 Cell Management

set to 20 MHz, 50 MHz, 70 MHz, 80 MHz, 90 MHz, or 100 MHz, NRDUCell. SsbFreqPos SsbFreqPos must be set to the value of NRDUCell. DlNarfcn DlNarfcn minus 36. l

DlBandwidth If NRDUCell.FrequencyBand is is set to n77, n78, or n79, and NRDUCell. DlBandwidth is set to 20 MHz, 50 MHz, 70 MHz, 80 MHz, 90 MHz, or 100 MHz, NRDUCell. SsbFreqPos SsbFreqPos must be set to the value of NRDUCell. DlNarfcn DlNarfcn minus 12.

l

DlBandwidth is not If NRDUCell.FrequencyBand is is set to n3 or n28 and NRDUCell. DlBandwidth set to 15 MHz, NRDUCell. SsbFreqPos SsbFreqPos must be set to the value of NRDUCell. DlNarfcn DlNarfcn.

If NRDUCell FrequencyBand is is set to n41 and NRDUCell DlBandwidth NRDUCell DlBandwidth is not set to
















Parameter Name

Parameter ID

NR DU Cell Coverage ID

NRDUCellCoverage. Nr Nr DuCellCoverageId DuCellCoverageId

3 Cell Management

Setting Notes N/A

Sec N/A Sector Equipment ID NRDUCellCoverage. Sec torEqmId


















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Cell Management(5G RAN2.1_Draft a)

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